patch 7.4.1537
Problem:    Too many feature flags for pipes, jobs and channels.
Solution:   Only use FEAT_JOB_CHANNEL.
diff --git a/src/memline.c b/src/memline.c
index 334392b..1c2ddbf 100644
--- a/src/memline.c
+++ b/src/memline.c
@@ -3059,7 +3059,7 @@
 							   (char_u *)"\n", 1);
     }
 #endif
-#ifdef FEAT_CHANNEL
+#ifdef FEAT_JOB_CHANNEL
     if (buf->b_write_to_channel)
 	channel_write_new_lines(buf);
 #endif